Embossing-machine.



R. MITCHELL.

EMBOSSING MACHINE.

APPLICATION TILED MAY 14, 1909 99%,686, Patented June 6,1911

2 SHEETS-SHEET1,

M ullllll e fm My wmvssses: G. MQ/WJ/I n1 (2 (XMJM R. MITCHELL.

EMBOSSING MACHINE.

APPLICATION FILED MAY 1-1. 1900 994,686, Patented June 6, 1911 2 SHEETS-SHEET 2i WITNESSES: INVENTOR itlit ld ftjftt @OBERT MITCHELL, 01 DETROIT, IVIICHIGAN, ASSIGNOR ()1? ONFLTHIRD T0 STEPHEN H.

KNIGHT,'0I? DETROIT, IlrJKICHIGAXiI.

EMBOSSIIQ'(Et-lYlIAGI-IINE.

Specification 0t .tetters Patent.

Application filed May 14, 190%].

Patented June it, till it.

Serial No. ttJEttlG l.

in to the aeeoin mnying drawings.

In staurg iing or einl'iossing paper, leather, light sheet metal, or the like, in ornamental work, it is desirable and necessary to gage the heat and pressure used with great aeeuraey in order to obtain uniform and good i results.

This invention relates to an einbt machine wherein eleetrieal heating ol the die plate and adjusting features of the mechanism insure uniform excellence in the product.

The invention eousists in the inathirs here inatter set forth, and more particularly pointed out in the appended claims.

Referring to the drawings, .l igure .l. a view in perspeetive of an embossing machine eml'iodying the features of the invention: Fig. 2 is a view,1 )artially in side e|eration, and partially in section, of the iuachine. Fig. 3 a View in longitudinal, tion through a bed plate. Fig. t is a view in transverse section through the bedplate. I 5 is a view in detail of a die holder and heater.

In general form the embossing n'uiehine resembles a stamping press, having, as shown in the drawings, a pedestal or base l and a Vertically dis )osed frame preferably integral therewith, all of cast metal, and suitably flanged and ribbed to combine strength and lightness, and to afford eompaet .arrangeinent ot the running parts and suitable support thereof.

The driving mechanism comprises a hori zonlal main shaft 3 journaled in bearings l, so as to give elearane above the base for a combined belt and drive-wheel 5 keyed there'ilu. A. parallel counter or eranlr shaft (3 is jourualed in the upper end of the main frame, and a pinion 7 keyed or ol'herwise secured to the main shaft meshes with a gen r 8, that is jo'urnaled on the crank shaft. The gear and its shaft may be interlocked by a clutch 9 of any preferred standard knoelco'lt' type, that is intermittently operated by a hnoelooff trigger 10, controlled through vand split to rereive a crankpin bushing suitable lever link and pedal (IOIlIlGClIlUll-i ll, by theoperator, and that is provided with a spring brake stop 12, adjustably secured on the frame, engaging a lug 13 on tho eluteh collar rim. l i eranlt dish 14 is seeured on. or made integral with the forward end of the eranh shaft and carries a crank. in ll; oll'aei: from the shaft,

ll' ays "to of r-auitable design are toruu-rl on or sweured lo the liaee of the frame, below and in vertical alineinent with the eranlr pin and iii the usual adjustment for weal. being provided for by a gib 1T secured by set s rmvs to. A hollow reetangular cross head 19 is reeiiiroeahle in the ways, through the u'iedil'uu ot a pitiuan rod 20 Whose lower end is journaled on a cross-pin in the head, and whose upper end is eounterborral e2, whieh is rlaniped therein by a set screw 23 engaging the slotted rod-end. The bushing is razeeulrieally bored, and a transversely slotted tlaue e 3-1 on its outer end, admits of being;- turued tor line zuljustn'ient of the hank thereon. A ea]; 52:3 seem-ed by a set screw it; prevents lateral movement of the rod.

.ljhe head. is extended downward. in the term oi a hollow eylinder :27, which is interiorly aerew-threaaled near its lower end to reeeive a flanged, eentrally apertured cap 28, radialapertures 39 in the llange periphery being provided for the appliration of a spanner bar or wrench. A spindle is eoneentrieally seeured in the eylinder, its lower portion extending through and being reeiprm-alile in the 3ll|l l3, and its upper portion being litlyfillllltlll to engage a il (tlllHLl pin or sr-rrw All in the eydinder, whieh prevents interrotation ol the parts. A. spring 3:? in compression between the upper shouldered wall ol the t', VllllLlUt' and a llange 325 iforined on the spindle holds the latter ruirinally projeeled through the (cylinder cap. The tension ol' the tuning may be varied by adjusliu r the (rap 22L. "lhe low-er part ol the spindle is rotzi'iterlmred and a stem 23% is seeured in the soekel thus formed by a pin.

35. The lower projertiug end ill) of the stem is spherical. Obviously the stern may be integral with the spindle, but the eonstruelion illustrated is preferable.

in embossing; die holder and heater seeured to the stem. This consists of a reetaugular healing plate-37, having a central plate 37. The upper side of the heating plate is hollowed out to form a chamber 431 in which is an electric heating coil 44, preferably oblon to correspond to the chamber, andbui t up in the usual way on an iron core with properly insulated wires 45 wound thereon and extended through an insulated bushing 46 in the heating plate to a suitable source of supply. Obviously the heating and socket plate may be integral.

with removable side for admitting the coil, but the construction above described is the preferred form: A rectangular embossing die holder or'frame 47 is removably secured against the underside of the heating plate 41. Preferably, a rabbeted, depending flange 48 is integrally formed along one of the lowermargins of the heating plate, and the opposite upper corner is chamfered off, forming a groove 49 parallel to the flange. One margin 50 of the die holder is rabbeted to interlock with the flange 48, and a groove 51 is formed in the opposite margin. This groove mates with and engages a rib 52 on a guide plate or gib 53, secured in alinement on the heating plate by a tongue 54 entering the groove 49, and by set screws 55. An adjustable stop 56, preferably in the form of a cap screw screwthreaded into the plate with its head overlapping the edge of the holder, and a latch 57 lock the holder against longitudinal displacement. A handle 58 is provided and the holder has the usual appurtenances for securing the die body.

The pedestal 1 extends well out below the press head, and a pair of broad horizontal ways 59 are formed or secured thereon. A carriage 60 is yieldingly supported over these ways on springs 61 interposed between the carriage and roller bearings 62 vertically movable in recesses on the carriage, whose rolls 63 run in parallel chan- I nels 64 in the ways, screws 65 entering vertical slots 66 in the bearings, retaining the bearings when the carriage is lifted. The carriage itself is further held in alinement by parallel wings 87 formed on the pedestal on either" side of the ways. Normally, the springs hold the carriage clear of the Ways to allow it to be freely moved. A horizontal 'table crushion block .68 is supported on the carriage, yertiiial adjustment being had by a parallel-wedge construction afforded by a eeacse supporting wedge plate 69, slidable on an inclined face 70 of the carriage between guide flanges 71 and 7 2 on the carriage and block. A horizontal hand screw 78 rotatably secured in a vertically elongated aperture in a lug 74 on the front of the carriage 60, engages and operates the wedge plate. A horizontal rectangular table 7 5 is yieldingly supported on the cushion block 68 by an annular block 76 of rubber or like resilient material, seated in the counterbored face of the block, a stop or guide 77 on the table engaging the front side of the block to prevent rotation of the parts. The carriage, wedge plate and table are further confined by a central stud 78, whose upper end is screwed into the table and Whose lower end is provided with jam-nuts 79 in a recess 80 in the carriage bottom, a spring 81 be tween the carriage and nuts and an elongated aperture 82 in the wedge permitting longitudinal movement of the latter. Clips or clamping bars 83 are'pivoted to either end of the table so as to close over the margins, and to retain layers of paper, cloth,

- felt, or other material which may be used for padding, backing or the like. As a further detail ofconstruction, an aperture 84*.- is formed in the frame back of the carriage, to allow strips of stock to be passed through as they are being operated on. Suitable lubricating means are provided as well as the usual provisions for adjustment for wear. 1

One of the features of the invention'is the universal joint connection of the die holder and heater to the head, by which the die may be accurately adjusted.

Another feature is the latitude of adjustmeet possible in the table, while at the same time, the table is firmly supported through the broad engaging surfaces of the carriage and its ways, when the pressure of the descending head compresses the roller springs.

Another feature of the invention is'the method of heating the embmsing die by electricity, which may be regulated so as to hold the die at any desired temperature, without danger of overheating or tarnishing the die face or injuringthe product; This ease of control of the heat together with the fine and accurate adjustment possible because of the arrangement of the mechanism, ins sures uniformity and excellence of work.

Obviously, the details of construction may be varied without departing from the spirit of the invention, and I do'not care to limit myself to any particular form or arrangement of parts. 1

What it claim as my invention is 1. An embossing machine having a vertically reciprocable head, a vertically yieldeing spindle therein, an electrically heated plate, a universal ball-andsocket connection securing the plate to the spindle, guide flanges on the plate, a die holding frame on the underside of the plate engaging said flanges and a latch retaining the frame.

2. An embossing machine having a vertically rcciprocable head, a spindle therein, a socket plate having a central upper boss, adjustable ball-and-socket connection be tween the boss and the spindle end, a heating plate with a recessed upper side, secured against the under side of the socket plate, an electric heating coil in the recess, a marginal, depending rabbcted flange on one margin of the heating plate, a parallel gib adjust-ably secured to the opposite margin of the heating plate, a die holding frame, whose opposite parallel margins have sliding ongagement with the flange and gib, an adjustable stop limiting the backward movement of the frame, and a latch locking the frame when against the stop.

3. An embossing machine having a vertically reciprocable rectangular head, a hollow cylinder integral therewith, an apertured cap screwthreaded into the lower end of the cylinder, a non-rotatahle, longitudinally movable flanged spindle in the cylinder, projecting through the cap, a spring in compression between the upper end of the cylinder and the spindle flange, a stem sccured in the lower end of the spindle, and die holding and heating means having an adjustable ball-and-socl-:et connection with the lower end of the stem.

4. An embossing machine comprising a frame, a head vertically reciprocablc therein, die holding and heating means on the head, a vertically yielding carriage horizontally movable in the frame, a table, and vertical adjusting means yieldingly supporting the table on the carriage.

An embossing machine comprising a frame, a head vertically rcciprocablc lhcrcin, die holding and heating means on the head, horizontally channeled ways on the frame beneath the head, rollers traversing the channel, a carriage yielding-1y supported on the rollers over the ways, and a table yieldingly and adjustably secured on the carriage.

3. An embossing machine comprising a frame, a head rcrlirally rcciprmaible therein, die homing and heating means on the head, horizontally channeled in the "frame beneath the head, a carriage over the Ways, rollers engaging the channels, journaled in bearing blocks having limited, vertically yielding movement in the carriage, and a table yieldingly secured on the carriage.

7. An embossing machine com rislng a frame, a head vertically reciproca le therein, die holding and heating means thereon, a horizontal carriage way in the frame beneath the head, a carriage, rollers journaled in bearings having independent limited vertical movement in the carriage, springs between the bearings and carnage normally supporting the carriage above the ways, and a table yieldingly secured on the carriage.

S. An embossing machine havin a vertically rcciprrmahle head, die holring and heating means thereon, a carriage horizontally movable below the head, having a longitudinally inclined face, an oppositely inclined longitudinally apcrturcd wedge movable thereon, a cushion block on the wedge, a cushion on the block, a horizontal table on the block, a depending stud passing through the supporting members and securing the table, am nuts on the stud, and a spring in compression between the under side of the carnage and the 1am-nuts on the stud.

S). An embossing machine having a main frame, a vertically reciprocable head, die holding and heating means thereon, a carriage horizontally movable in the frame below the head, having a longitudinally inclined upper face provided with marginal guide flanges, a horizontal cushion bloclc having depending marginal flanges mating with the carriage llangcs, a wedge slidable between the flanged faces of the carriage and block, a horizontal hand-screw engaging the carriage adapted to operate the wedge, a cushion on the block, a horizontal table on the cushion, a stud secured to the table longitudinally movable in the block, wedge and carriage, and a s ring in the carriage engaging the stud, a apted to oppose the wedge.

in testimony whereof I afiix my signature in presence of two witnesses.

ROBERT MITCHELL.

\Vit ncsses:

U'r'ro F. Banrnen, ANNA M. Donn. 

